Friction-clutch for loose pulleys.



H. T. BELBEN. PRIGTION CLUTCH FOR LOOSE PULLEYS. APPLICATION FILED ARR. 17, 1911.

Patntedysept.3,1912.

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4a citizen of .the United States, Toledo, 1n -the count-y of Lucas TEU STATES HAWL-EY T. IBELD'EN, 0F TOLEDG, OHIO.

FRICTION-CLUTCH FOR LOOSE PULLEYS.

ennemies.

Specification of Letters Patent.

Application filed April 17,

Patented Sept. 3, 1912.

1911. Serial No. 621,607.

To all whom. it may concern.'

Be it known that I, HAWLEYT. BELDEN, residing at and State of Ohio, have invented new and useful Im* .provements in Friction-Clutches for Loose Pulleys, cation.

My invention relates to a friction clutch for loose pulleys and has for its object to'I provide a device of the kind for mounting a `pulley normally loose on a line or counter-` shaft, and whereby the pulley may be .frick tionally engaged and revolved with the shaft, and disengaged at will, I accomplish these objects by the construction and combi-v nation of parts as hereinafter described' and.;V

f portion of the sleeve 1 an interiorly threadedI collar 11 is run in to near the disk 10. The

illustrated in the drawings, in which- Figure 1 is a longitudinal diametric sec-A tion' of a clutch .device constructed in ac-g Cordance with my invention, and mountedjy on a '.fshaft and having a pulley mounted looselyV thereon,.the parts of the clutch beingf in position 'to release the pulley from fric-g tional engagement therewith. Fig. 2 is a similar view showing parts in yposition frictionally engaging the pulley. Fig. 3 is ani inside view of a half section of a split sleeve adapted to be Xedly mounted on the shaft.

Fig. 4 is an end view of the sleeve 'formed by uniting the -two half sections. Fig. 5 is` an inside view of a half section of a. split bearing hub for the pulley. Fig. 6 is an end view of the adjustable clutch collar With the pressure arms removed. Fig. 7 is a side view ofa split shift cam collar, and Fig. 8 is an end view of the same'.

In the' drawings 1 designates a sleeve adapted to be iixedly mounted on a shaft 2 by a key 3 in the usual manner. The sleeve 1 is provided at one end with a disk flange 4 having the inner side faced to form a friction surface, and at the opposite end is threaded for a distance.'

. The sleeve 1 is preferably, for convenience ofv mounting it'on'the shaft 2, formed of half sections A, as lshown in Fig. 3 but may be formed of 'a single piece of metal having a bore to closely receive the shaft.

The sleeve 1 is provided at one side of its bore with a key seat 5 complementary to a key seat 6 in the shaft toreceive the key 3, whereby the sleeve is xedly secured to the shaft, and its periphery is surfaced as a bearing .upon which ris journaled a hub sleeve 7 of less length than the sleeve 1.

of which-the following is a specifi-v l the sleeve l have tightly assembled around f The sleeve 7 is provided at one end with a disk flange 8 having its outer face surfaced for. frictional engagement with the inner face of the flange 4 of the sleeve 1. For convenience of assembling the sleeve 7 is also preferably formed of longitudinal half sections B, which after being assembled around collar 1l is provided with diametrically opposite bifurcated lugs 12, in which are fulorumed near their inner ends the leverarms 13, having long arm port-ions 14 curved inward toward the shaft 2 and outward at.

their end portions. to form cams 15, and short arm cam portions 16 adapted as the long arms 14 are moved outward to engage the disk 10 and press it against the end of the hub sleeve 7 of the pulley.

The disk flange 4 of the sleeve 1 is provided withan annular roove 17 in which is seated one end of a s ort helical spring 18 coiled around the sleeve l and engaging at its opposite end the ange 8 of the hub sleeve 7. When a split sleeve 1 is used the half sections A are secured together around the shaft by bolts or screws 19 through lugs 20 formed on the disk viiange 4 and by the collar 11 run on the threaded end portion of the sleeve. Upon the shaft2 adjacent to the cam portions 15 of the lever arms 13 is mounted a shift collar 21 having at its outer end portion an annular groove 22 which adapts it for engagement by the yoke 'of a shift lever (not shown). The opposite end portion of the collar is rounded to adapt it to be wedged between the cam portion 15 of the arms 13, as shown in' Fig. 2, by a throw of the collar by the shift lever.

The collar 1l is preferably also formed of half sections C, dividing the collar on a diametric line at from points central between the lugs' 12 and dividing lugs 12', which are provided' with reglsterlng screw orifices whereby the half sections are secured together in threaded engagement around the slightly relaxed permits thegadjustment of as shown in Fig. 2,

lparts in position as 1 spring 18 separates .adapted for use on either a line or counterslide the friction disk and the second sleeve on the first sleeve and frictionally clamp the second sleeve between the disk flange of the first sleeve and the friction disk.

2. In a friction clutch for loose pulleys, the combination with the shaft, an elongated sleeve fixedly mounted on the shaft and provided' with a friction flange at one end,'a sleeve hub of reduced length journaled on the fixed sleeve, said sleeve hub having a flange at one end adapted to frictionally en gage the flange of the fixed sleeve, a pulley fiXedly mounted on the sleeve hub, and an annular friction disk slidably mounted on the fixed sleeve and adapted t0- shoulder against the other end of the sleeve hub, of a collar `adapted to be adjustably clamped on the fixed sleeve adjacent te the friction disk, a plurality of levers fulcrumed on the collar, each lever having a short cam arm adapted to wedge between the fulerum and the fric; tion disk, and a long cam arm, and a shift sleeve by the screws 23 either of which when the collar on the threadsof the sleeve l, an when tightened up, to lock the collar in any osition to which it is adjusted.

Thus constructed, when the several parts are assembled on ra shaft with 'the several shown in Fig. l, by movement of they shift collar 2l by the shift lever between the arms lll of the levers 13, the hub sleeve 7 is moved lengthwise and .its flangev 8 is tightly compressed against| the friction face of the flange a of the sleeve 3 and thereby frietionally revolves t-he pulley with the shaft. Then the shaft collar 2l is moved from between the levers 13, the pressure released and the the friction flanges 4l and 8 and the pulley comes to a rest, while the shaft and the sleeve l revolve freely in the sleeve 7. It 'is apparent that the clutch is shaft. cam collar slidably mounted. on the shaft lNhat I claim to be new is and adapted. to be shifted intov and `out of l. A friction clutch for loose pulleys, wedging engagement with the long arms of comprising an elongated sleeve adapted to the levers, and eonjointly operate the short be fixedly mounted on a shaft', said sleeve armste frictionally clamp the sleeve hub behaving a disk flange at one end, a secon tween the flange of the fixed sleeve and the friction disk.

In witness whereof l. have hereunto set my hand this 13th day of ivarch, ltll.

HQVLE i7 'il ll Elli) EN ln. presence of NVM. J'. liiursC-nn,` M. S. Sarrieri.

sleeve of reduced length journaled en the rst sleeve, said secondA sleeve having a disk flange at one end adjacent to and adapted to frictionally engage the disk flange of the first sleeve, a pulley fiXedly mounted on the second sleeve as a hub and abutting its flange, an annular friction disk slidably mounted onv the first sleeve and means to 

